Re: LPEG and indentation based syntax

[Fabien <fleutot+lua@...>]

There's a sample in metalua which uses indentation to structure statement blocks. The extension is here:

     http://metalua.luaforge.net/src/samples/pythonic.lua.html

And here's an example of a program using it:
----------------------------------------------------------------------
-- This file requires an alternative lexer, therefore it must be
-- compiled that way:
-- > mlc -x pythonic.lua pysample.lua
-- Or, if you want to execute it right away:
-- > mlc -x pythonic.lua -x pysample.lua
----------------------------------------------------------------------

print "Eratosthenes' Sieve, in pythonic Metalua:"

function print_sieve (limit):
  
local sieve, i = { }, 2
  
while i<limit:
    while sieve[i]:
      i=i+
1
    print(i)
    for j = i*i, limit, i:
      sieve[j] = true

    i=i+1

print_sieve(100)

In case there are issues with indentation through mail (one of the reasons why I'm no fan of significant whitespaces in real-life conditions), it's also available at 
http://metalua.luaforge.net/src/samples/pysample.lua.html